Marked refusal to miss a turning (5)
I believe the answer is:
lined
'marked' is the definition.
(lining is a kind of marking)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for lined that I've seen before include "Creased" , "displaying signs of age" , "Put in a row" , "Ruled; furrowed" , "Strengthened" .)